Fostex Dallas II - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 10th April 2010, 04:08 AM   #1
diyAudio Member
maartentje's Avatar
Join Date: Jun 2002
Location: USA, FL
Default Fostex Dallas II

Hi guys,

I am starting with the building of the Dallas II. Any tips about the damping material in the cabinet? Cant find anything about it.

  Reply With Quote
Old 10th April 2010, 05:53 AM   #2
diyAudio Moderator
planet10's Avatar
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Should be no damping required in the horn. You'll want to play with it in the air cavity.

community sites,, ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 10th April 2010, 03:39 PM   #3
diyAudio Member
maartentje's Avatar
Join Date: Jun 2002
Location: USA, FL

Thnx the air cavity is the area behind the driver right? What kind of material you sugest?

  Reply With Quote
Old 24th April 2010, 04:17 PM   #4
diyAudio Member
maartentje's Avatar
Join Date: Jun 2002
Location: USA, FL
Is this the way it should be ? Any tips?
Attached Images
File Type: jpg IMG_6554.jpg (124.9 KB, 590 views)
  Reply With Quote
Old 25th April 2010, 01:55 PM   #5
DaveCan is offline DaveCan  Canada
diyAudio Member
DaveCan's Avatar
Join Date: Nov 2005
Location: Moncton NB
Looks like a good start to me for damping And good job on the build too!!, however it's too bad it had to be made from mdf If you like what you hear when your ready to fire them up (and I'm sure you will), it would be a great improvement to make another set out of Baltic Birch ply or equivalent, instead of mdf ... Dave

Last edited by DaveCan; 25th April 2010 at 01:59 PM.
  Reply With Quote
Old 25th April 2010, 02:18 PM   #6
mightym is offline mightym  United States
diyAudio Member
mightym's Avatar
Join Date: Feb 2008
Location: Checotah, Okrahoma former home of the Okra Fest
In a post on the old Fullrange forum, the designer stated IIRC.

Put some felt in the bends, and add 1-4 Ohm series resistance to taste.

This is paraphrased, of course, but he did recomend damping the outside of the 2 bends, and adding a small amount of resistance to taste. I believe he also said something about the chamber behind the driver too.

If I can ever get off my A$$, I've got a pair of Dallas II's to finish too.


The forum is searchable, and that's how I found the above. I do not remember the search terms I used, sorry. I found the above when researching my build.

Good looking build BTW.
  Reply With Quote
Old 25th October 2016, 07:57 AM   #7
diyAudio Member
Join Date: Jul 2016
Originally Posted by maartentje View Post
Is this the way it should be ? Any tips?
What material have you used in the closed triangular cavities, Martin?


  Reply With Quote
Old 27th October 2016, 12:40 PM   #8
jimbro is offline jimbro  United States
diyAudio Member
Join Date: Nov 2010
Location: somewhere in Texas
I'd use play sand.


Not Martin :-)
  Reply With Quote
Old 27th October 2016, 07:48 PM   #9
chrisb is offline chrisb  Canada
diyAudio Member
Join Date: Aug 2002
Location: victoria BC
I've used clay based kitty litter and glass "sand" blasting media on different builds, and even went to the extreme of wax filled shot (as in shot-gun). The latter was a holy mess - only tried that once - and I doubt worth the effort.
... so, not as easy at it sounds, this letting go thing
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Dallas II plans Novacaine1968 Full Range 6 13th February 2010 01:42 PM
Dallas II + 208E = ? Mr.Mekulic Full Range 13 15th December 2008 06:20 PM
Dallas II with AER MK1? tocaco3 Full Range 9 16th April 2008 12:19 PM
Where is the Dallas II amisdad Full Range 16 5th November 2005 05:57 PM

New To Site? Need Help?

All times are GMT. The time now is 12:45 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
Copyright 1999-2016 diyAudio

Content Relevant URLs by vBSEO 3.3.2